MRS / MRSW SERIES CONDENSING UNIT ... - Master-Bilt

MRS / MRSW SERIES 

CONDENSING UNIT 

INSTALLATION & OPERATIONS MANUAL 

1 st Revision (May 2009)

TABLE OF CONTENTS 

INTRODUCTION……………………………………………………………………………………………..3 

WARNING LABES AND SAFETY INSTRUCTIONS…………………………………………………….4 

MRS SERIES CONDENSING UNIT FEATURES………………………………………………………...5 

MRS POD SYSTEM NOMENCLATURE…………………………………………………………………..6 

MRSW POD SYSTEM NOMENCLATURE………………………………………………….…………….7 

PRE-INSTALLATION INSTRUCTIONS…………………………………………………………….……..8 

General Information…………………………………………………………………………………….…………8 

Delivery Inspection………………………………………………………………………………………….….…8 

INSTALLATION INSTRUCTIONS…………………………………………………………….………...…8 

Handling and Placement of Multiple Rack System…………………………………………………………....8 

Handling and Placement of Walk-In Evap(s)………………………………………………………………...…8 

Electrical Specifications………………………………………………………………………………………. …9 

Refrigerant Piping……………………………………………………………………………………………..…10 

Suction and Liquid Line Sizes………………………………………………………………………..……..11-12 

Leak Check…………………………………………………………………………………………………….…13 

Evacuation, Dehydration, and Start-Up………………………………………………………………….....…13 

Evacuation Procedure……………………………………………………………………………..…..14 

Finishing Charging Procedure…………………………………………………………………......…14 

Low Ambient Charging (Example)……………………………………………………………...…....17 

MRS/MRSW POD CONDENSING UNIT SPECIFICATIONS………………………………..…...18-22 

REFRIGERANT REQUIRED PER LENGTH OF REF. LINE………………………………..….........22 

SALE AND DISPOSAL……………………………………………………………………………..….…23 

LABOR WARRANTY……………………………………………………………………………………..23 

ENGINEERING DETAILS (MRS/MRSW)………………………………………………………......24-30 

GENERAL ELECTRICAL WIRING DIAGRAMS……………………………………………. .......31-34 

MASTER-CONTROLLER WIRING DIAGRAMS…………………….........................................35-39 

MRS/MRSW START-UP DATA TABLE………………………………………………………..…...…40 

2

INTRODUCTION 

Thank you for purchasing Master-Bilt refrigeration equipment. This manual contains important instructions for 

installation, use and service. Read this entire manual carefully before installing or servicing your Master-Bilt equipment. 

NOTICE 

Installation and service of the refrigeration and electrical components must be preformed by a refrigeration 

mechanic or licensed electrician. 

DANGER 

Equipment MUST be properly grounded. 

Improper or faulty hook-up of electrical components of the refrigeration units can result in severe injury or 

death. All electrical wiring hook-ups must be done in accordance with all applicable local, regional or national 

standards. 

NOTICE 

Read this manual before installing your refrigeration equipment. Keep the manual and refer to it before doing 

any service. Failure to do so could result in personal injury or equipment damage. 

The portions of this manual covering refrigeration and electrical components contain technical instructions intended only 

for persons qualified to perform refrigeration and electrical work. 

This manual cannot cover every installation, use, or service situation. If you need additional information, call or write us: 

Parts and Technical Service Department 

Master-Bilt Products 

908 Highway 15 North 

New Albany, MS 38652 

Phone (800) 684-8988 

Email: service@master-bilt.com 

3

WARNING LABELS AND SAFETY INSTRUCTIONS 

This is the safety-alert symbol. When you see this symbol, be alert to the potential for personal injury or 

damage to your equipment. 

Be sure you understand all safety messages and always follow recommended precautions and safe operating practices. 

NOTICE TO EMPLOYERS 

You must make sure that everyone who installs, uses, or services your refrigeration equipment is thoroughly 

familiar with all safety information and procedures. 

Important safety information is presented in this section and throughout the manual. The following signal words are 

used in the warnings and safety messages: 

DANGER: Severe injury or death WILL occur if you ignore the message. 

WARNING: Severe injury or death CAN occur if you ignore the message. 

CAUTION: Minor injury or damage to your refrigeration can occur if you ignore the message. 

NOTICE: This is important installation, operation or service information. If you ignore the message, you may 

damage your refrigeration. 

The warning and safety labels shown throughout this manual are placed on your Master-Bilt Products 

refrigeration at the factory. Follow all warning label instructions. If any warning or safety labels become lost or 

damaged, call your customer service department at (800) 684-8988 for replacements. 

This Label is located on the condensing unit 

4

MRS SERIES CONDENSING UNIT FEATURES 

• Generously sized individual copper aluminum condenser for each compressor sized for high efficiency. Sized to 

operate efficiently in high Ambient 

• Hermetic, semi-hermetic, and Scroll compressors in any combination the customer chooses 

• Reliable Ball Bearing Fan Motors 

• Spring Mounted Semi-Hermetic Compressors, Hermetic and Scroll Compressors use Vibration Absorbing 

Grommet Mounts 

• Generously sized receivers with isolation valves 

• Compressor Suction Service Valves with Access Ports, and Discharge Line Service Valves with Access Ports 

on Semi- Hermetic Compressors only 

• Pre-wired and mounted Dual Pressure Controls with each Compressor 

• Units leak and electrical tested 

• U.L. listed 

• Easy accessibility for service 

• Pre-wired for easy installation with Single Point Electrical Connection with individual Circuit Breakers for each 

Compressor and Through Door Main Disconnect Switch and Circuit Breaker Installed 

• Suction and discharge line vibration eliminators pre-piped and mounted (semi-hermetic only) 

• Crankcase Heater Installed for each Compressor 

• Refrigeration line pre-piped to edge of unit 

• Pre-piped and mounted refrigerant sight glass and filter drier 

• Pre-installed inverted traps on all roof top MRS series Condensing units 

• Flooded Head Pressure Controls on each System 

• Stainless Steel Housing 

• Engineered Refrigeration Drawing Available for Specified Projects, or with Purchase Order (Contact Factory for 

Additional Details 

• Master-Controller Electronic Refrigeration Controls for Maximum Energy Efficiency are Optional for most 

Systems. Patented Reverse Cycle Defrost Technology that saves up to 27% on Operational Energy Cost of the 

System it Controls Depending on Ambient Temperatures. 

5

C = Master-Bilt Rack System 

MRS POD SYSTEM NOMENCLATURE 

C C H X OO5 B 

Compressor Type Voltage Code 

C = Semi-Hermetic A = 115/60/1 V 

D = Discuss B = 208-230/60/1 V 

H = Hermetic C = 208-230/60/3 

S = Scroll D = 460/60/1 

E = 460/60/3 

Temperature Range 

H = High/Medium 

M = Medium 

L = Low (-40 - -25 )ºF System Capacity (Horsepower) 

OO3 = 1/3 HP 

Refrigerant Type OO5 = 1/2 HP 

X = R-22 OO7 = 3/4 HP 

Z = R404a O1O = 1 HP 

O15 = 1 1/2 HP 

O2O = 2 HP 

O3O = 3 HP 

O4O = 4 HP 

O5O = 5 HP 

O6O = 6 HP 

O75 = 7 1/2 HP 

O9O = 9 HP 

1OO = 10 HP 

Options: 

CAAA005A = 6" COIL (REMOTE CIRCUIT) 





6

MRSW POD SYSTEM NOMENCLATURE 

C C H X OO5 W B 

C = Master-Bilt Rack System 

W= Water Cooled 

Compressor Type 

C = Semi-Hermetic 

D = Discuss 

H = Hermetic 

S = Scroll 

Voltage Code 

A = 115/60/1 

B = 208-230/60/1 

C = 208-230/60/3 

D = 460/60/1 

E = 460/60/3 

Temperature Range 

H = High/Medium System Capacity (Horsepower) 

M = Medium OO3 1/3 HP 

L = Low (-40 - 25 )ºF OO5 = 1/2 HP 

OO7 = 3/4 HP 

Refrigerant Type O1O = 1 HP 

X = R-22 O15 = 1 1/2 HP 

Z = R404a O2O = 2 HP 

O3O = 3 HP 

O4O = 4 HP 

O5O = 5 HP 

O6O = 6 HP 

O75 = 7 1/2 HP 

O9O = 9 HP 

1OO = 10 HP 

7

PRE-INSTALLATION INSTRUCTIONS 

I. GENERAL INFORMATION 

Please read this manual prior to installing your Master-Bilt equipment. This information is based on good refrigeration 

practice and should be used as a guide for installation and operation. 

II. DELIVERY INSPECTION 

You are responsible for filling all freight claims with the delivering truck line. Inspect all cartons and crates for damage 

as soon as they arrive. If damage is noted to shipping crates or cartons or a shortage is found, note this on the bill of 

lading (all copies) prior to signing. 

If damage is discovered when the cabinet is uncrated, immediately call the delivering truck line and follow up the call 

with a written report indicating concealed damaged to your shipment. Ask for an immediate inspection of your 

concealed item. Crating material MUST be retained to show the inspector representing the truck line. 

INSTALLATION INSTRUCTIONS 

I. HANDLING AND PLACEMENT OF MULTIPLE RACK SYSTEM 

To minimize damage to the unit housing, it is recommended that the crate not be removed until the rack system is 

moved to its final location. 

There should be a minimum of 3 feet around the perimeter of the Rack System that should be unobstructed. 

This allows for proper air flow through the condenser. Likewise, this will also make servicing the equipment 

much easier. 

Holes are provided in the base supports for mounting bolts and for bridle lift rods. 

For indoor mounting, motor rooms should be provided with fans designed to move 100 CFM of air per one ton of 

refrigeration capacity. 

II. HANDLING AND PLACEMENT OF WALK-IN EVAP(S) 

To minimize damage to the evaporator coil, it is recommended that the carton (or crate) not be removed until the 

evaporator coil is moved close to its final location. When the container is removed from the evaporator coil, extreme 

care must be used when lifting and mounting to the ceiling, to prevent sheet metal damage 

Evaporator coils will be mounted the appropriate distance from the cooler wall to allow proper air return to evaporator 

coils. Minimum distance shall be greater than or equal to the vertical height of the evaporator coil or as specified in 

applicable Installation and Operation Manuals. 

8

III. ELECTRICALSPECIFICATIONS 

Electrical power supply must match the condensing unit 

power requirements indicated on the unit data plate. A 

WIRING DIAGRAM IS LOCATED ON THE INSIDE ON 

THE ELECTRICAL BOX COVER. For best results, it is 

suggested that power supply for MRS Rack systems be 

applied as illustrated below in Figure 1. All field wiring 

should be done in a professional manner, in accordance 

with all governing codes. All wiring (including factory 

terminals) should be double checked before start-up 

The refrigeration installer will be responsible for the interconnect 

wiring between Medium temperature timers and 

solenoids and Low temperature evaporators and timers. 

MASTER-BILT WILL GLADLY SHIP ANY TIMER LOOSE 

WITH PROPER ENCLOSURE SO THAT THEY MAY BE 

PLACED 

IN A MORE SUITABLE LOCATION IF REQUESTED 

AND APPROVED BY FEC OR CONSULTANT. 

Figure 1: Suggested Field Wiring Location for MRS Units. 

Evaporator drain line heaters will be installed on any application with a room temperature less than 34ºF. A 6 ft. drain 

line heater (208-230V) will be provided with each low temperature coil. 

NOTICE! 

Systems with scroll compressors must be checked for proper power phasing. Improper power phasing will result in 

improper compressor rotation causing compressor to pump incorrectly. An optional phase monitor may be purchased 

for this purpose. 

Three phase scroll compressors are directional dependent, i.e., they will only compress in one rotational direction and 

will rotate in either direction depending on power phasing. Verification of proper rotational direction is made by 

observing that suction pressure drops and discharge pressure rises when the compressor is energized. Reverse 

rotation also results in an elevated sound level over correct rotation, as well as substantially reduced current draw 

compared to data tag values. 

NOTICE! 

Check phase alignment on all incoming power. 

9

IV. REFRIGERANT PIPING 

Use only refrigeration grade copper tubing, (ACR), type “L”, bright annealed, dehydrated, and properly sealed against 

contamination. Soft temper tubing may not be used for field interconnection of refrigeration components (condensing 

unit to evaporator assembly). Take extreme care to keep refrigeration tubing clean and dry prior to installation. Use an 

appropriate size tube cutter. Remove any burring that may occur when cutting the tubing. Use dry nitrogen to purge the 

system of any foreign objects that may have come about during any pipe cutting. 

All suction lines will be insulated with not less than ¾” Armaflex or acceptable substitute as determined by Master-Bilt 

personnel. Armaflex insulation must be properly glued or taped as approved by insulation manufacturer to prevent 

refrigeration lines from “sweating”. 

Appropriate oil must be added to systems with refrigeration line exceeding 50 ft horizontal or 10 ft vertical as per 

Compressor manufacturer specifications. 

Suction lines should be sloped down ½” for each 10 feet of horizontal run towards the compressor. This will facilitate 

good oil return to the compressor. 

Refrigeration lines will be sized appropriately to facilitate 

proper oil return to the compressor and reduce refrigerant 

line pressure drop. Table 1 and Table 2 depict proper line 

sizing options. Use this as a guideline for your selection. 

Any fittings used may be accounted for in the Table to the 

right. 

Fitting 

Size 90º Ell 

1/2" 0.9 

5/8" 1 

7/8" 1.5 

1-1/8" 1.8 

1-3/8" 2.4 

1-5/8" 2.8 

2-1/8" 3.9 

Tee Tee 

45º Ell (Line) (Branch) 

0.4 0.8 2 

0.5 1 2.5 

0.7 1.5 3.5 

0.9 1.5 4.5 

1.2 1.8 6 

1.4 2 7 

1.8 3.8 10 

Equivalent Length Allowances for Pipe Fittings 

(length in feet) 

10

R-22 Suction and Liquid line sizes 

20F suction temperature 10F suction temperature -15F suction temperature -25F suction temperature All 

System 50' 100' 200' 50' 100' 200' 50' 100' 200' 50' 100' 200' 

Capacity suction line suction line suction line suction line suction line suction line suction line suction line suction line suction line suction line suction line liquid 

BTU/Hr. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. line 

1500 5/16 5/16 5/16 5/16 3/8 5/16 3/8 5/16 3/8 5/16 3/8 5/16 3/8 3/8 1/2 3/8 1/2 3/8 1/2 3/8 1/2 3/8 5/8 3/8 1/4 

2000 3/8 5/16 3/8 5/16 1/2 5/16 3/8 3/8 1/2 3/8 1/2 3/8 1/2 3/8 1/2 3/8 5/8 3/8 1/2 3/8 5/8 3/8 5/8 3/8 1/4 

3000 3/8 3/8 3/8 3/8 1/2 3/8 1/2 3/8 1/2 3/8 5/8 3/8 1/2 1/2 5/8 1/2 5/8 1/2 5/8 1/2 5/8 1/2 3/4 1/2 1/4 

4000 1/2 3/8 1/2 3/8 5/8 3/8 1/2 3/8 1/2 3/8 5/8 3/8 5/8 1/2 5/8 1/2 3/4 1/2 5/8 5/8 3/4 5/8 3/4 5/8 1/4 

5000 1/2 3/8 1/2 3/8 5/8 3/8 1/2 3/8 5/8 3/8 5/8 3/8 5/8 5/8 3/4 5/8 3/4 5/8 3/4 5/8 3/4 5/8 7/8 5/8 1/4 

6000 1/2 3/8 5/8 3/8 5/8 3/8 5/8 1/2 5/8 1/2 3/4 1/2 5/8 5/8 3/4 5/8 7/8 5/8 3/4 3/4 7/8 3/4 7/8 3/4 5/16 

7000 1/2 1/2 5/8 1/2 5/8 1/2 5/8 1/2 5/8 1/2 3/4 1/2 3/4 5/8 3/4 5/8 7/8 5/8 3/4 3/4 7/8 3/4 1 1/8 3/4 5/16 

8000 5/8 1/2 5/8 1/2 5/8 1/2 5/8 1/2 3/4 1/2 3/4 1/2 3/4 3/4 7/8 3/4 7/8 3/4 3/4 3/4 7/8 7/8 1 1/8 7/8 5/16 

9000 5/8 1/2 5/8 1/2 5/8 1/2 3/4 5/8 3/4 5/8 7/8 5/8 3/4 3/4 7/8 3/4 1 1/8 3/4 7/8 7/8 1 1/8 7/8 1 1/8 7/8 5/16 

10000 5/8 5/8 3/4 5/8 3/4 5/8 3/4 5/8 3/4 5/8 7/8 5/8 3/4 3/4 7/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 7/8 1 1/8 7/8 5/16 

12000 5/8 5/8 3/4 5/8 3/4 5/8 3/4 3/4 3/4 3/4 7/8 3/4 7/8 7/8 1 1/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 7/8 1 1/8 7/8 3/8 

14000 3/4 5/8 3/4 5/8 7/8 5/8 7/8 3/4 7/8 3/4 1 1/8 3/4 7/8 7/8 1 1/8 7/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 3/8 

16000 3/4 3/4 7/8 3/4 7/8 3/4 7/8 3/4 7/8 3/4 1 1/8 3/4 7/8 7/8 1 1/8 7/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 3/8 

18000 3/4 3/4 7/8 3/4 1 1/8 3/4 7/8 7/8 7/8 7/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1/2 

20000 3/4 3/4 7/8 7/8 1 1/8 7/8 7/8 7/8 7/8 7/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1/2 

25000 7/8 7/8 1 1/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 7/8 1 1/8 7/8 1 1/8 1 1/8 1 3/8 1 1/8 1 3/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 5/8 1 3/8 1/2 

30000 7/8 7/8 1 1/8 7/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 5/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 1/2 

35000 7/8 7/8 1 1/8 7/8 1 3/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 5/8 

40000 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 5/8 

45000 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 5/8 

50000 1 1/8 1 1/8 1 3/8 1 1/8 1 3/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 5/8 

60000 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 3/4 

70000 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 3/4 

80000 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 3/4 

90000 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 3/4 

100000 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 3/4 

110000 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 7/8 

120000 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 7/8 

130000 1 5/8 1 5/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 3 1/8 3 1/8 7/8 

140000 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 3 1/8 3 1/8 7/8 

150000 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 7/8 

160000 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 1 5/8 1 5/8 2 1/8 2 1/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 7/8 

Table 1 

11

R-404a Suction and Liquid line sizes 

20F suction temperature 10F suction temperature -15F suction temperature -25F suction temperature -35F suction temperature All 

System 50' 100' 200' 50' 100' 200' 50' 100' 200' 50' 100' 200' 50' 100' 200' 

Capacit y suction line suction line suction line suction line suction line suction line suction line suction line suction line suction line suction line suction line suction line suction line suction line liquid 

BTU/Hr . horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. horiz. vert. line 

1500 3/8 5/16 3/8 5/16 1/2 5/16 3/8 5/16 1/2 5/16 1/2 5/16 1/2 3/8 1/2 3/8 5/8 3/8 1/2 3/8 5/8 3/8 5/8 3/8 1/2 1/2 5/8 1/2 3/4 1/2 1/4 

2000 3/8 5/16 1/2 5/16 1/2 5/16 3/8 3/8 1/2 3/8 1/2 3/8 1/2 3/8 5/8 3/8 5/8 3/8 1/2 1/2 5/8 1/2 3/4 1/2 5/8 1/2 5/8 1/2 3/4 1/2 1/4 

3000 1/2 3/8 1/2 3/8 5/8 3/8 1/2 3/8 1/2 3/8 5/8 3/8 5/8 1/2 5/8 1/2 3/4 1/2 5/8 1/2 3/4 1/2 3/4 1/2 5/8 5/8 3/4 5/8 7/8 5/8 5/16 

4000 1/2 3/8 1/2 3/8 5/8 3/8 1/2 3/8 5/8 3/8 5/8 3/8 5/8 1/2 3/4 1/2 3/4 1/2 5/8 5/8 3/4 5/8 7/8 5/8 3/4 3/4 7/8 3/4 7/8 3/4 5/16 

5000 1/2 3/8 5/8 3/8 5/8 3/8 5/8 1/2 5/8 1/2 3/4 1/2 5/8 5/8 3/4 5/8 7/8 5/8 3/4 3/4 7/8 3/4 7/8 3/4 3/4 7/8 7/8 7/8 1 1/8 7/8 3/8 

6000 5/8 1/2 5/8 1/2 5/8 1/2 5/8 1/2 5/8 1/2 3/4 1/2 3/4 5/8 3/4 5/8 7/8 5/8 3/4 3/4 7/8 3/4 1 1/8 3/4 7/8 7/8 1 1/8 7/8 1 1/8 7/8 3/8 

7000 5/8 1/2 5/8 1/2 3/4 1/2 5/8 1/2 3/4 1/2 3/4 1/2 3/4 3/4 7/8 3/4 1 1/8 3/4 7/8 7/8 7/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 7/8 1 1/8 7/8 3/8 

8000 5/8 1/2 3/4 1/2 3/4 1/2 5/8 5/8 3/4 5/8 7/8 5/8 3/4 3/4 7/8 3/4 1 1/8 3/4 7/8 7/8 1 1/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 7/8 1 1/8 7/8 3/8 

9000 5/8 1/2 3/4 1/2 3/4 1/2 5/8 5/8 3/4 5/8 7/8 5/8 7/8 7/8 7/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 7/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 3/8 

10000 5/8 5/8 3/4 5/8 7/8 5/8 3/4 5/8 3/4 5/8 7/8 5/8 7/8 7/8 1 1/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 7/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 3/8 

12000 3/4 5/8 3/4 5/8 7/8 5/8 3/4 3/4 7/8 3/4 1 1/8 3/4 7/8 7/8 1 1/8 7/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 3/8 1 1/8 1/2 

14000 3/4 3/4 7/8 3/4 7/8 3/4 3/4 3/4 7/8 3/4 1 1/8 3/4 1 1/8 7/8 1 1/8 7/8 1 3/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1/2 

16000 3/4 3/4 7/8 3/4 1 1/8 3/4 7/8 7/8 7/8 7/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 3/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 5/8 13/8 

1/2 

18000 3/4 3/4 7/8 3/4 1 1/8 3/4 7/8 7/8 1 1/8 7/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 5/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 3/8 1/2 

20000 7/8 7/8 7/8 7/8 1 1/8 7/8 7/8 7/8 1 1/8 7/8 1 1/8 7/8 1 1/8 1 1/8 1 3/8 1 1/8 1 3/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 5/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 1/2 

25000 7/8 7/8 1 1/8 7/8 1 1/8 7/8 1 1/8 7/8 1 1/8 7/8 1 3/8 7/8 1 1/8 1 1/8 1 3/8 1 3/8 1 5/8 1 3/8 1 1/8 1 1/8 1 3/8 1 5/8 1 5/8 1 5/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 5/8 

30000 7/8 7/8 1 1/8 7/8 1 3/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 5/8 

35000 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 3/8 1 1/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 5/8 

40000 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 3/4 

45000 1 1/8 1 1/8 1 3/8 1 1/8 1 3/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 3/4 

50000 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 3/4 

60000 1 1/8 1 1/8 1 3/8 1 3/8 1 5/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 7/8 

70000 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 7/8 

80000 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 7/8 

90000 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 2 1/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 3 1/8 3 1/8 7/8 

100000 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 7/8 

110000 1 5/8 1 5/8 1 5/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 3 1/8 3 1/8 2 5/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 7/8 

120000 1 5/8 1 5/8 2 1/8 1 5/8 2 1/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 2 5/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 1 1/8 

130000 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 2 5/8 2 5/8 3 1/8 3 1/8 3 5/8 3 5/8 1 1/8 

140000 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 3 1/8 3 1/8 2 5/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 2 5/8 2 5/8 3 1/8 3 1/8 3 5/8 3 5/8 1 1/8 

150000 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 3 1/8 3 1/8 2 5/8 2 5/8 3 1/8 3 1/8 3 1/8 3 1/8 2 5/8 2 5/8 3 1/8 3 1/8 3 5/8 3 5/8 1 1/8 

160000 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 2 5/8 2 5/8 3 1/8 3 1/8 3 1/8 3 1/8 2 5/8 2 5/8 3 1/8 3 1/8 3 5/8 3 5/8 1 1/8 

Table 2 

12

All vertical risers will have an appropriate “P” trap at the beginning of the riser and every 20 ft above this point. If the 

total rise is less distance than can be evenly divided by 20, the P-traps will be located at the beginning and in the center 

of the distance so that the total distance between any two traps does not exceed 20 ft. 

Keep the refrigeration lines as short as possible and use as few fittings as practicable, being especially careful not to 

“kink” the lines. Keep the layout as simple as possible and properly support the piping to absorb vibration and the 

normal expansion and contraction caused by temperature changes. 

Liquid line filter driers, TXV, and solenoids will be installed on all systems that are single compressor per single 

evaporator coil and Master-Bilt has provided the evaporator coil. 

The TXV sensing Bulb must be properly mounted on the horizontal portion of the refrigerant suction line and properly 

insulated. For systems with a suction line 7/8” OD or larger, surface temperature may vary slightly around the 

circumference of the tube. Because of this, Sporlan recommends that sensing bulbs be mounted at the 4 or 8 o’clock 

position. For smaller lines, the bulb may be mounted at any point (other than the bottom) on the horizontal suction 

line. 

Add appropriate amount of oil per compressor manufacturer recommendations to compensate for longer refrigeration 

line runs. 

When brazing, dry nitrogen MUST be passed through the lines at low pressure to prevent scaling and oxidation inside 

the tubing and fittings. All flux will be removed from the joints when brazing is complete. 

MINIMIZE the amount of flux used to prevent internal contamination of the refrigeration system. 

Silver brazing wire is to be utilized (high temperature alloy of minimum of 5% silver content on all copper connections, 

and high temperature alloy of 45% silver content on all dissimilar metal connections. 

The refrigeration contractor will be responsible for providing and installing the liquid line solenoid valve and coil for all 

systems where multiple evaporator coils are used or for “multiplexed” systems. 

V. LEAK CHECK 

When all refrigeration line connections have been made, the complete system, including factory connections, should be 

checked. 

Add the proper refrigerant to 60 psig, and then boost the 175 psig with dry nitrogen. Leak checks should be done on all 

joints with an electronic leak detector or halide torch. If leaks are found, relieve the pressure and make repairs as 

necessary and recheck. 

VI. EVACUATION, DEHYDRATION, AND START-UP 

A vacuum of 500 microns or less must be pulled to properly dehydrate the refrigeration system. This requires a twostage 

vacuum pump with an electronic vacuum indicator. 

Do not use the system compressor as a vacuum pump. 

Do not operate compressor while system is in a vacuum. 

13

Evacuation Procedure 

A. Open all condensing unit service valves and relieve system pressure. Also, open any line valves installed in the system 

and energize all solenoid valves to facilitate evacuation. 

B. Connect the vacuum pump to the high and low sides of the system using ¼” or larger copper lines or ¼” ID hoses with 

high vacuum design. 

C. Leaks or moisture will be indicated if the system pressure rises when the vacuum line is closed off. 

Pull a vacuum of 1500 microns, close vacuum line and “break” vacuum to 5 psig, maximum, with refrigerant to be used 

in the system. 

E. Repeat step D. 

F. A final vacuum of 250 microns should be pulled before charging. When 250 microns is reached, close vacuum line and 

charge system with the proper refrigerant through the high side. See Table 4 (pp.17-19) for proper pre-charge for 

respective pod. More refrigerant will be required depending upon the lengths of refrigeration lines required. Refer to 

Table 5 for additional charge requirements for a given length of refrigeration line. Gradually add refrigerant until 

recommended superheat values are obtained. (See Table 3 below) 

NOTE: Never add liquid refrigerant to the suction side of the compressor. 

Finishing Charging Procedures 

A. Preliminary 

Table 3 

Applicable Temperature Recommended Superheat 

Medium 6ºF - 12ºF 

Low 5ºF - 10ºF 

1. Be sure all service valves are “open”. 

2. Loosen the compressor hold-down bolts and remove shipping clips to allow compressor to float freely on the springs. 

(Semi-hermetic only) 

3. Check evaporator fan motors, after start-up. Medium temperature, air defrost fans run continuously, low temperature 

fans and coolers provided with electric defrost will be delayed by the fan control. 

4. Check phase alignment of incoming power on all refrigeration systems as noted in the Electrical Specifications section 

of this manual. 

5. Start by “flipping on” the circuit breaker or circuit breakers in the unit electrical box. 

6. Preset all room thermostats to the proper temperature. 

7. Check operating pressures while charging and on initial pull down, to prevent damage if a problem occurs. If system 

“floods” back to the compressor, adjust thermostatic expansion valve as required for proper operation. There should be 

at least +30º F superheat entering the compressor. Master-Bilt recommendations for superheat values seen at the 

evaporator are given in Table 3. 

8. For scroll compressors, verify power phasing and rotational direction as noted in the Electrical Specifications section of 

this manual. 

9. Observe compressor amperage draw and compare to compressor nameplate to prevent damage due to high 

amperage. The oil sight glass, when equipped, should be between ½ and ¾ full during normal operation. 

14

B. Low Ambient Charging Procedure 

All standard air cooled condensers on the MRS Rack System are 

equipped with a head pressure control valve to maintain proper head 

pressure during winter conditions. These valves function by reducing 

the effective condenser area by flooding or “backing up” refrigerant in 

the condenser to reduce the amount of surface available for 

condensing. To operate properly, more charge is required during this 

flooding condition. This valve is not necessary when applying systems 

with the Master Controller and winter charges are negligible. Please 

contact our Customer Service Department for more about Master- 

Controller Technology. 

To use the chart, multiply the pounds of recommended pre-charge 

obtained by adding the recommended pre-charge (Table 4) with the 

additional refrigerant required for line set length (Table 5) by the 

percent flooding required in Chart A to arrive at the additional charge 

required. 

Typical Head Pressure Control Valve 

15

Chart A: 

16

Example of Low Ambient Charging 

Determine the additional charge to operate a CHHX035C at suction temp +20ºF and the unit 

is charged at +50ºF. Assume a 100 ft. line set (horizontal). 

1. Capacity for CHHX035C @ +20ºF = 24,800 BTUH 

2. Choose the proper refrigeration lines base on capacity from Table 1, suction line = 1 1/8”, liquid line = ½”. 

3. Look up the recommended pre-charge from Table 4 for CHHX035C (8.5 lbs of R-22). 

4. From Table 5, find the additional refrigerant (R-22 in this case) required for a ½” liquid line of length 100 ft. 

(7.6 lb of R-22) 

5. Add these two values to get 16.1 lbs of R-22. 

6. Look at Chart A to obtain multiplier. The horizontal axis of Chart A yields the ambient charging temperature 

(50º). The vertical axis of Chart A yields the multiplier. Notice there are several graphs in this chart. Select 

the graph corresponding to your desired suction temperature. In this case, 20ºF. One can now see that the 

condenser should be flooded at 32% to operate correctly. 

7. Multiply 16.1 lbs of R-22 by 32% to get 5.15 lbs of additional charge. 

8. Again, finish charging until desire superheat settings are obtained. 

17

208-230/60/1 Volt Applications 

R-22 Refrigerant 

TABLE 4: MRS POD CONDENSING UNIT SPECIFICATIONS 

**************** BTU/HR Capacity **************** Receiver 

Master-Bilt Compressor At Room Temp. With a 10° TD, 90° Ambient Tank Connections Compressor Recommended 

Model Model -20 -10 0 20 30 35 40 HP 90%/90°F Liquid Suction RLA LRA Pre-Charge (lb) R-22 

CCHX005B HAG2-0050-CAV 2760 3600 4110 4620 0.50 5.74 3/8 5/8 4.0 22.0 3.19 

CHHX003B AKA9428EXD 2747 3908 4489 4779 0.33 5.74 1/4 3/8 3.7 23.0 3.19 

CHHX005B ART69C1-IAV 3470 4460 5075 5690 0.50 5.74 3/8 5/8 6.4 34.0 3.19 

CCHX007B KAN2-0075-CAV 4270 5580 6360 7140 0.75 5.74 3/8 5/8 6.1 36.0 3.19 

CHHX007B RS47C2-IAV 4200 5680 6530 7380 0.75 5.74 3/8 5/8 7.1 35.5 3.19 

R-404a Refrigerant 



Model Model -20 -10 0 20 30 35 40 HP 90%/90°F Liquid Suction RLA LRA Pre-Charge (lb) R-404a 

CCLZ005B KANB-005E-CAV 1070 1690 2460 0.50 4.95 3/8 5/8 3.6 24.0 2.75 

CHLZ005B AFT22C1E-CFV 1200 1830 2460 0.50 4.95 3/8 5/8 3.5 34.0 2.75 

CHLZ007B AFT29C1E-CFV 1640 2540 3440 0.75 4.95 3/8 5/8 4.4 38.7 2.75 

CCLZ007B KAMB-007E-CAV 2180 3100 4300 0.75 4.95 3/8 7/8 5.6 36.0 2.75 

CCLZ010B KAJB-010E-CAV 2970 4200 5600 1.00 4.95 3/8 7/8 6.9 40.0 2.75 

CSLZ050B ZF15K4E-PFV 13300 17800 22300 5.00 16.9 1/2 1-1/8 31.8 169.0 9.39 

CHHZ003B AKA9427ZXD 2417 3424 3928 4179 0.33 4.95 1/4 3/8 3.8 23.0 2.75 

CCHZ005B HAJB-005E-CAV 3500 4500 5000 5500 0.50 4.95 3/8 5/8 3.7 22.0 2.75 

CHHZ005B RS43C1E-CAV 3600 4860 5490 6120 0.50 4.95 3/8 5/8 5.4 24.1 2.75 

CCHZ007B KANB-007E-CAV 4400 5800 6500 7200 0.75 4.95 3/8 7/8 5.4 36.0 2.75 

CHHZ007B RS55C1E-CAV 4200 6180 7170 8160 0.75 4.95 3/8 7/8 6.7 33.5 2.75 

CHHZ010B RS70C1E-PFV 5520 7960 9180 10400 1.00 4.95 3/8 7/8 7.0 34.2 2.75 

CHHZ050B CS33K3E-PFV 25100 36500 42200 47900 5.00 16.9 5/8 1-3/8 30.7 125.0 9.39 

18

MRS POD CONDENSING UNIT SPECIFICATIONS (CONTINUED) 






CCHX010C KAR1-0100-TAC 6080 7790 8795 9800 1.00 5.74 3/8 5/8 4.3 27.0 3.19 

CHHX010C RS70C1E-TFC 6170 8330 9565 10800 1.00 5.74 3/8 5/8 4.7 31.0 3.19 

CCHX015C KAGA-0150-TAC 7710 10100 11450 12800 1.50 11.4 3/8 7/8 5.5 35.5 6.33 

CHHX015C CRA1-0150-TFC 7300 10100 11750 13400 1.50 11.4 3/8 7/8 9.3 58.0 6.33 

CCHX020C ERA1-0200-TAC 6890 11800 14400 17000 2.00 11.4 1/2 7/8 6.6 46.0 6.33 

CHHX020C CRD1-0200-TF5 9680 13440 15730 18020 2.00 11.4 1/2 7/8 8.7 50.0 6.33 

CSHX020C ZB15KCE-TF5 9600 14800 17400 20000 2.00 11.4 5/8 7/8 9.3 55.0 6.33 

CHHX022C CRE1-0225-TF5 11090 15360 17970 20580 2.25 11.4 1/2 7/8 10.6 60.0 6.33 

CSHX025C ZB19KCE-TF5 13600 18000 20200 22400 2.50 15.3 5/8 7/8 9.7 63.0 8.50 

CHHX025C CR33KQ-TF5 14100 19400 22400 25400 2.50 11.4 1/2 7/8 10.6 69.0 6.33 

CHHX030C CR37KQ-TF5 16200 22100 25550 29000 3.00 15.3 1/2 7/8 11.1 85.0 8.50 

CSHX030C ZB21KCE-TF5 17500 23300 26200 29100 3.00 15.3 5/8 7/8 11.1 77.0 8.50 

CCHX030C ERF1-0310-TAC 18400 23900 27150 30400 3.00 15.3 1/2 7/8 12.4 82.0 8.50 

CHHX035C CR41KQ-TF5 18600 24800 28350 31900 3.50 15.3 1/2 7/8 13.1 90.0 8.50 

CSHX035C ZB26KCE-TF5 20800 27200 30400 33600 3.50 17.2 5/8 7/8 13.6 88.0 9.56 

CSHX040C ZS30K4-TF5 25500 31600 35050 38500 4.00 17.2 5/8 1-1/8 15.0 99.0 9.56 

CSHX034C ZB30KCE-TF5 24200 31800 35600 39400 4.00 17.2 5/8 1-1/8 15.0 99.0 9.56 

CCHX040C NRB2-0400-TFC 24100 32600 37450 42300 4.00 17.2 5/8 1-1/8 21.8 141.0 9.56 

CSHX050C ZB38KCE-TF5 29700 39100 43800 48500 5.00 17.2 5/8 7/8 21.4 123.0 9.56 

CCHX050C NRA2-0500-TFC 29200 38700 44200 49700 5.00 17.2 5/8 1-1/8 19.2 141.0 9.56 

CHHX050C CRN5-0500-TF5 29100 38800 44200 49600 5.00 17.2 5/8 1-1/8 21.4 130.0 9.56 

CSHX060C ZB45KCE-TF5 36000 47000 52500 58000 6.00 17.2 7/8 1 1/8 21.4 123.0 9.56 





CHLZ010C CF04K6E-TF5 1860 3050 4610 1.00 4.95 3/8 7/8 6.4 52.0 2.75 

CCLZ010C KAJA-011E-TAC 2900 4000 5400 1.00 4.95 3/8 7/8 4.6 27.0 2.75 

CHLZ015C CF06K6E-TF5 3270 5190 7660 1.50 4.95 3/8 1-1/8 7.0 52.0 2.75 

CCLZ015C KALA-016E-TAC 4360 6100 8000 1.50 4.95 3/8 7/8 6.6 50.0 2.75 

CHLZ020C CF09K6E-TF5 5230 8060 11500 2.00 11.3 1/2 1-1/8 9.9 65.1 6.28 

CCLZ020C EAVA-021E-TAC 5290 7800 10900 2.00 11.3 1/2 7/8 7.4 50.0 6.28 

CSLZ020C ZF06K4E-TF5 5330 7090 8850 2.00 11.3 3/8 7/8 9.3 55.0 6.28 

CCLZ030C 3ABA-031E-TAC 6260 9300 13000 3.00 15.1 1/2 7/8 10.0 82.0 8.39 

CHLZ030C CF12K6E-TF5 7010 10500 14500 3.00 15.1 1/2 1-1/8 11.9 85.0 8.39 

CSLZ030C ZF09K4E-TF5 7600 10100 12600 3.00 15.1 3/8 7/8 11.1 77.0 8.39 

CCLZ032C LAHA-032E-TAC 8290 12500 17600 3.50 15.1 1/2 1-1/8 12.8 112.0 8.39 

CSLZ040C ZF13K4E-TF5 10300 14200 18100 4.00 15.1 1/2 7/8 15.0 99.0 8.39 

CCLZ040C NRD1-032E-TFC 11210 15600 20700 4.00 15.1 1/2 1-1/8 16.3 82.0 8.39 

CSLZ050C ZF15K4E-TF5 13100 17700 22300 5.00 16.9 1/2 1-1/8 21.4 123.0 9.39 

CSLZ060C ZF18K4E-TF5 15800 21200 26600 6.00 16.9 1/2 1-1/8 23.9 156.0 9.39 

CDLZ040C 2DL3-040E-TFC 15930 21800 28800 4.00 15.1 1/2 1-1/8 26.3 161.0 8.39 

CSLZ075C ZF24K4E-TWC 18800 25300 31800 7.50 16.9 1/2 7/8 30.9 189.0 9.39 

CDLZ060C 2DB3-060E-TFC 19840 27000 35400 6.00 16.9 5/8 1-3/8 28.2 161.0 9.39 

CCHZ005C HAJA-005E-TAC 3300 4100 4700 5300 0.50 4.95 3/8 5/8 3.5 19.9 2.75 

CCHZ007C KANA-007E-TAC 4200 5500 6300 7100 0.75 4.95 3/8 5/8 3.5 19.9 2.75 

CHHZ010C RS70C1E-TFC 5520 7960 9180 10400 1.00 4.95 3/8 7/8 4.7 31.0 2.75 

CCHZ010C KARA-010E-TAC 6500 8200 9300 10400 1.00 4.95 3/8 5/8 4.3 27.0 2.75 

CHHZ015C CS10K6E-TF5 8700 11900 13500 15100 1.50 11.3 1/2 7/8 7.5 51.0 6.28 

CCHZ015C KAKA-020E-TAC 10600 13600 15000 16400 1.50 11.3 1/2 7/8 6.6 46.0 6.28 

CHHZ020C CS12K6E-TF5 9900 13900 15900 17900 2.00 11.3 1/2 1-1/8 7.5 51.0 6.28 

CSHZ020C ZB15KCE-TF5 13100 16300 18150 20000 2.00 11.3 5/8 7/8 9.3 55.0 6.28 

CHHZ022C CS14K6E-TF5 12000 16200 18300 20400 2.50 11.3 1/2 1-1/8 9.1 55.0 6.28 

CCHZ020C ERCA-021E-TAC 13600 17400 19500 21600 2.00 11.3 1/2 1-1/8 8.8 46.0 6.28 

CSHZ025C ZB19KCE-TF5 16600 20400 22600 24800 2.50 15.1 5/8 7/8 9.7 63.0 8.39 

CSHZ030C ZB21KCE-TF5 20000 24500 27150 29800 3.00 15.1 5/8 7/8 11.1 77.0 8.39 

CHHZ030C CS20K6E-TF5 14700 23100 27300 31500 3.00 15.1 5/8 1-1/8 11.4 75.0 8.39 

CCHZ030C ERFA-031E-TAC 19900 25300 28400 31500 3.00 15.1 5/8 1-1/8 12.4 82.0 8.39 

CSHZ035C ZB26KCE-TF5 23300 28600 31700 34800 3.50 16.9 5/8 7/8 13.6 88.0 9.39 

CHHZ040C CS27K6E-TF5 20600 30000 34700 39400 4.00 16.9 5/8 1-3/8 15.6 82.0 9.39 

CSHZ040C ZS30K4E-TF5 27100 33500 37050 40600 4.00 16.9 5/8 1-1/8 15.0 99.0 9.39 

CCHZ040C NRB2-040E-TFC 26500 34400 38900 43400 4.00 16.9 5/8 1-3/8 21.8 141.0 9.39 

CHHZ050C CS33K3E-TF5 24100 35700 41500 47300 5.00 16.9 5/8 1-3/8 20.7 90.0 9.39 

CDHZ050C 2DC3-050E-TFC 30500 39100 44200 49300 5.00 16.9 5/8 1-3/8 22.3 120.0 9.39 

CSHZ050C ZB38KCE-TF5 33400 40900 45250 49600 5.00 16.9 5/8 1-1/8 21.4 123.0 9.39 

CSHZ055C ZB38KCE-TF5 33300 40900 45300 49700 5.00 16.9 5/8 7/8 21.4 123.0 9.39 

CSHZ060C ZB45KCE-TF5 39600 48600 53800 59000 6.00 16.9 7/8 1 1/8 21.4 123.0 9.39 

CSHZ058C ZB45KCE-TF5 40200 49000 54150 59300 6.00 16.9 5/8 1-1/8 23.9 156.0 9.39 

19

MRS POD CONDENSING UNIT SPECIFICATIONS (CONTINUED) 

460/60/3 Volt Applications 





CHHX030E CR37KQ-TFD 16200 22100 25550 29000 3.00 15.3 1/2 7/8 5.6 39.0 8.50 

CSHX030E ZB21KCE-TFD 17500 23300 26200 29100 3.00 15.3 5/8 7/8 6.1 39.0 8.50 

CCHX030E ERF1-0310-TAD 18400 23900 27150 30400 3.00 15.3 1/2 7/8 6.4 41.0 8.50 

CHHX035E CR41KQ-TFD 18600 24800 28350 31900 3.50 15.3 1/2 7/8 5.9 42.0 8.50 


CSHX040E ZB30KCE-TFD 25500 31600 35050 38500 4.00 17.2 5/8 1-1/8 7.5 47.5 9.56 

CSHX034E ZB30KCE-TFD 24200 31800 35600 39400 4.00 17.2 5/8 1-1/8 7.5 47.5 9.56 

CCHX040E NRB2-0400-TFD 24100 32600 37450 42300 4.00 17.2 5/8 1-1/8 11.3 62.5 9.56 


CCHX050E NRA2-0500-TFD 29200 38700 44200 49700 5.00 17.2 5/8 1-1/8 9.6 62.5 9.56 

CHHX050E CRN5-0500-TFD 29100 38800 44200 49600 5.00 17.2 5/8 1-1/8 9.6 65.0 9.56 

CSHX060E ZB45KCE-TFD 36000 47000 52500 58000 6.00 17.2 7/8 1 1/8 11.5 70.0 9.56 





CCLZ030E 3ABA-031E-TAD 6260 9300 13000 3.00 15.1 1/2 7/8 5.1 41.0 8.39 

CHLZ030E CF12K6E-TFD 7070 10700 14800 3.00 15.1 1/2 1-1/8 6.6 42.0 8.39 

CSLZ030E ZF09K4E-TFD 7600 10100 12600 3.00 15.1 3/8 7/8 5.7 39.0 8.39 

CCLZ032E LAHA-032E-TAD 8290 12500 17600 3.50 15.1 1/2 1-1/8 6.0 56.0 8.39 

CSLZ040E ZF13K4E-TFD 10300 14200 18100 4.00 15.1 1/2 7/8 8.2 49.5 8.39 

CCLZ040E NRD1-032E-TFD 11210 15600 20700 4.00 15.1 1/2 1-1/8 8.4 41.0 8.39 

CSLZ050E ZF15K4E-TFD 13100 17700 22300 5.00 16.9 1/2 1-1/8 9.6 62.0 9.39 

CSLZ060E ZF18K4E-TFD 15800 21200 26600 6.00 16.9 1/2 1-1/8 9.3 70.0 9.39 

CDLZ040E 2DL3-040E-TFD 15930 21800 28800 4.00 15.1 1/2 1-1/8 10.2 60.0 8.39 

CSLZ075E ZF24K4E-TWD 18800 25300 31800 7.50 16.9 1/2 7/8 15.7 94.0 9.39 

CDLZ060E 2DB3-060E-TFD 19840 27000 35400 6.00 16.9 5/8 1-3/8 13.3 80.0 9.39 

CSHZ030E ZB21KCE-TFD 20000 24500 27150 29800 3.00 15.1 5/8 7/8 6.1 39.0 8.39 

CHHZ030E CS20K6E-TFD 14700 23100 27300 31500 3.00 15.1 5/8 1-1/8 5.1 40.0 8.39 

CCHZ030E ERFA-031E-TAD 19900 25300 28400 31500 3.00 15.1 5/8 1-1/8 5.8 41.0 8.39 


CHHZ040E CS27K6E-TFD 20600 30000 34700 39400 4.00 16.9 5/8 1-3/8 7.7 52.0 9.39 

CSHZ040E ZB30KCE-TFD 27100 33500 37050 40600 4.00 16.9 5/8 1-1/8 7.5 47.5 9.39 

CCHZ040E NRB2-040E-TFD 26500 34400 38900 43400 4.00 16.9 5/8 1-3/8 9.0 62.5 9.39 

CHHZ050E CS33K3E-TFD 24100 35700 41500 47300 5.00 16.9 5/8 1-3/8 9.9 45.0 9.39 

CDHZ050E 2DC3-050E-TFD 30500 39100 44200 49300 5.00 16.9 5/8 1-3/8 10.4 60.0 9.39 



CSHZ060E ZB45KCE-TFD 39600 48600 53800 59000 6.00 16.9 7/8 1 1/8 11.5 70.0 9.39 


CDLZ075E 3DB3F33KE-TFD 23100 36200 46900 7.50 27.62 5/8 1 3/8 15.7 83.0 15.34 

20


MRSW POD CONDENSING UNIT SPECIFICATIONS 

R-22 


Master-Bilt Compressor At Room Temp. With a 10° TD, 90° Ambient Tank Connections Compressor Recommended Required GPM 

Model Model -20 -10 0 20 30 35 40 HP 90%/90°F Liquid Suction RLA LRA Pre-Charge (lb) R-22 For a 10ºF TD 

CCHX005WC HWJ1-0050-TAC 3470 4480 5030 5580 1/2 4.0 3/8 1/2 2.2 13.0 2.22 1.27 

CCHX007WC KWE1-0075-TAC 5550 7115 8040 8965 3/4 6.2 3/8 5/8 3.4 19.9 3.44 2.03 

CCHX010WC KWM1-0100-TAC 7520 9810 11100 12390 1 6.2 3/8 5/8 4.5 27.0 3.44 2.80 

CCHX015WC KWKA-0200-TAC 11300 14700 16600 18500 1 1/2 11.9 3/8 7/8 6.8 50.0 6.61 4.18 

CCHX020WC KWKA-0200-TAC 10860 13040 14130 15220 2 11.9 3/8 7/8 6.8 50.0 6.61 3.56 

CCHX030WC 3RA1-0310-TAC 23500 30000 33600 37200 3 40.6 1/2 1 1/8 13.1 82.0 22.56 8.47 

CCHX040WC NRB2-0400-FTC 26000 34900 40100 45300 4 68.4 1/2 1 1/8 21.8 141.0 38.00 10.11 

CCHX050WC NRA2-0500-TFC 31290 41350 47170 52990 5 68.4 1/2 1 1/8 19.2 141.0 38.00 11.89 

CCHX075WC 2DA3-750-TFC 53060 67240 76005 84770 7 1/2 128.7 5/8 1 3/8 32.0 169.0 71.50 19.15 

CCHX100WC 3DB3A1000-TFC 75990 96610 108520 120430 10 144.0 7/8 1 3/8 43.6 215.0 80.00 27.35 

R-404A 



Model Model -20 -10 0 20 30 35 40 HP 90%/90°F Liquid Suction RLA LRA Pre-Charge (lb) R-404A For a 10ºF TD 

CCHZ005WC HWJA-005E-TAC 3880 4980 5550 6120 1/2 3.5 3/8 1/2 2.2 13.0 1.94 1.40 

CCHZ007WC KWNA-007E-TAC 4940 6450 7280 8110 3/4 10.9 3/8 5/8 3.0 19.9 6.06 1.83 

CCHZ010WC KWRA-010E-TAC 7210 9090 10280 11470 1 12.3 3/8 5/8 4.3 27.0 6.83 2.59 

CCHZ015WC KWGA-010E-TAC 8640 11000 12400 13800 1 1/2 10.3 3/8 7/8 4.3 27.0 5.72 3.12 

CCHZ020WC KWKA-020E-TAC 12300 15400 17400 19400 2 10.3 3/8 7/8 6.8 50.0 5.72 4.38 

CCHZ030WC ERFA-031E-TAC 22000 27800 31200 34600 3 35.2 1/2 1 1/8 12.4 82.0 19.56 7.86 

CCHZ050WC 2DC3-050E-TFC 33610 43100 48510 53920 5 59.3 1/2 1 3/8 22.3 120.0 32.94 12.22 

CCHZ075WC 2DA3-075E-TFC 58900 73700 82100 90500 7 1/2 111.5 5/8 1 3/8 32.0 169.0 61.94 20.69 

CCHZ100WC 3DB3-100E-TFC 82590 102750 114200 125650 10 124.8 7/8 1 3/8 43.6 215.0 69.33 28.78 

CCHZ150WC 3DS3A150E-TFC 11310 140900 156800 172700 15 174.7 1 1/8 1 5/8 59.6 275.0 97.06 39.51 

CCLZ005WC KWNA-006E-TAC 1290 1990 2860 1/2 5.4 1/4 1/2 2.1 13.2 3.00 0.59 

CCLZ007WC KWMA-007E-TAC 2240 3250 4460 3/4 5.4 3/8 5/8 3.2 19.9 3.00 0.97 

CCLZ010WC KWJA-011E-TAC 3360 4660 6250 1 5.4 3/8 5/8 4.6 27.0 3.00 1.39 

CCLZ015WC KWLA-016E-TAC 4900 6750 8870 1 1/2 10.3 3/8 7/8 6.6 50.0 5.72 2.01 

CCLZ020WC EAVA-021E-TAC 6580 9170 12300 2 21.1 3/8 7/8 7.4 50.0 11.72 2.73 

CCLZ028WC NRD1-0302E-TFC 12500 17300 22900 2 1/2 35.2 1/2 1 1/8 16.3 82.0 19.56 5.16 

CCLZ030WC 2DF3-030E-TFC 14440 19810 26130 3 59.3 1/2 1 1/8 16.8 102.0 32.94 5.90 

CCLZ040WC 2DL3-040E-TFC 17660 24020 31640 4 59.3 1/2 1 3/8 26.3 161.0 32.94 7.16 

CCLZ060WC 2DA3-060E-TFC 20680 27710 36090 6 59.3 1/2 1 3/8 28.8 161.0 32.94 8.26 

CCLZ075WC 3DB3A075E-TFC 29750 39440 51090 7 1/2 111.5 5/8 1 3/8 31.5 161.0 61.94 11.75 

CCLZ090WC 3DF3A090E-TFC 36130 48130 62620 9 124.8 7/8 1 3/8 39.0 215.0 69.33 14.34 

CCLZ100WC 3DS3A100E-TFC 41090 54480 70250 10 124.8 7/8 1 3/8 42.0 215.0 69.33 16.24 

CCLZ150WC 4DL3-150E-TSK 57400 74700 94800 15 152.9 1 1/8 1 5/8 52.6 278.0 84.94 22.26 

21

460/60/3 Volt Applications 

R-22 

MRSW POD CONDENSING UNIT SPECIFICATIONS (CONTINUED) 



Model Model -20 -10 0 20 30 35 40 HP 90%/90°F Liquid Suction RLA LRA Pre-Charge (lb) R-22 For a 10ºF TD 

CCHX030WE 3RA1-0310-TAD 23500 30000 33600 37200 3 40.6 1/2 1 1/8 6.6 41.0 22.56 8.47 

CCHX040WE NRB2-0400-TFD 26300 34700 39650 44600 4 19.2 1/2 1 1/8 21.8 141.0 10.67 9.99 

CCHX050WE NRA2-0500-TFC 31290 41350 47170 52990 5 68.4 1/2 1 1/8 9.6 62.5 38.00 11.89 

CCHX075WE 2DA3-750-TFC 53060 67240 76005 84770 7 1/2 128.7 5/8 1 3/8 14.1 85.0 71.50 19.15 

CCHX100WE 3DB3A1000-TFC 75990 96610 108520 120430 10 144.0 7/8 1 3/8 20.0 106.0 80.00 27.35 

R-404A 



Model Model -20 -10 0 20 30 35 40 HP 90%/90°F Liquid Suction RLA LRA Pre-Charge (lb) R-404A For a 10ºF TD 

CCHZ030WE ERFA-031E-TAC 22000 27800 31200 34600 3 35.2 1/2 1 1/8 5.8 41.0 3.08 7.86 

CCHZ050WE 2DC3-050E-TFC 33610 43100 48510 53920 5 59.3 1/2 1 3/8 10.4 60.0 1.52 12.22 

CCHZ075WE 2DA3-075E-TFC 58900 73700 82100 90500 7 111.5 5/8 1 3/8 14.1 85.0 1.69 20.69 

CCHZ100WE 3DB3-100E-TFC 82590 102750 114200 125650 10 124.8 7/8 1 3/8 20.0 106.0 1.01 28.78 

CCHZ150WE 3DS3A150E-TFC 11310 140900 156800 172700 15 174.7 1 1/8 1 5/8 29.0 138.0 1.26 39.51 

CCLZ030WE 2DF3-030E-TFC 14440 19810 26130 3 59.3 1/2 1 1/8 8.1 52.0 0.31 5.90 

CCLZ040WE 2DL3-040E-TFC 17660 24020 31640 4 59.3 1/2 1 3/8 10.5 60.0 9.88 7.16 

CCLZ060WE 2DA3-060E-TFC 20680 27710 36090 6 59.3 1/2 1 3/8 10.2 60.0 9.88 8.26 

CCLZ075WE 3DB3A075E-TFC 29750 39440 51090 7 1/2 111.5 5/8 1 3/8 16.1 83.0 18.58 11.75 

CCLZ090WE 3DF3A090E-TFC 36130 48130 62620 9 124.8 7/8 1 3/8 16.9 106.0 10.90 14.34 

CCLZ100WE 3DS3A100E-TFC 41090 54480 70250 10 124.8 7/8 1 3/8 18.6 106.0 5.32 16.24 

CCLZ150WE 4DL3A150E-TSK 57400 74700 94800 15 152.9 1 1/8 1 5/8 26.3 139.0 3.91 22.26 

TABLE 5: 

Additional lb of Refrigerant for Length of Ref. Line 

25 Ft 50 Ft. 100 Ft. 

Line (OD) 3/8 1/2 5/8 7/8 1 1/8 1 3/8 3/8 1/2 5/8 7/8 1 1/8 1 3/8 3/8 1/2 5/8 7/8 1 1/8 1 3/8 

R-22 1.0 1.9 3.0 6.1 10.4 15.9 2.0 3.8 6.0 12.2 20.8 31.8 4.0 7.6 12.0 24.4 41.6 63.6 

R-404A 0.9 1.6 2.6 5.3 9.0 13.8 1.8 3.2 5.2 10.6 18.0 27.6 3.6 6.4 10.4 21.2 36.0 55.2 

22

SALE AND DISPOSAL 

If you sell or give away your refrigeration equipment system or components you must make sure that all safety labels 

and I&O Manuals are included. If you need replacement labels or manuals, contact the parts and technical service 

department at Master-Bilt at (800) 684-8988 

The customer service department at Master-Bilt should be contacted at the time of sale or disposal of your equipment 

so records may be kept of its new location. 

If you sell or give away your Master-Bilt cabinet and you evacuate the refrigerant charge before shipping, you must 

evacuate the refrigerant into an approved recovery and reclaim system in order to satisfy all applicable federal and state 

regulations regarding release of refrigerant compounds into the atmosphere. 

The release of refrigerant compounds into the atmosphere is a source of ozone depletion and regulated by 

state and federal laws. 

LABOR WARRANTY 

A. A 90 day labor warranty will be provided on all installer provided labor and installation. 

B. A 1 year optional Labor warranty will be quoted separate from the installation. 

C. Master-Bilt will provide a one year parts warranty on all parts that fail under normal operation conditions. 

23

TYPICAL MRS SERIES PIPING SCHEMATIC 

24

MRS-1B PHYSICAL DIMENSIONS 

25


26


27


28

TYPICAL MRSW ENGINEERING DETAIL 

29

. 

33

Typical Air Defrost Wiring Diagram 

Typical Electric Defrost Wiring Diagram 

35

N.O. 

36

DI1 

38

MASTER-BILT MRS/MRSW START-UP DATA 

Project Name:_______________________ Requested by:_______________________ 

Project Location:_____________________ Requested by:_______________________ 

Expected Installation time: Year_________ Quarter (1,2,3,or 4) ___________________ 

Installing Company: __________________ Installer Signature:____________________ 

POD Suction Discharge Refrigerant Charge 

Sytstem Description Pressure Pressure Type Amount (lbs) Superheat 

NOTES: 

40

MRS / MRSW SERIES CONDENSING UNIT ... - Master-Bilt

Create successful ePaper yourself

Delete template?

Save as template?